Freezing Injury of Seed Corn 
85 
row of each plat for the yield test. This arrangement permitted 
a direct comparison of the inherent yielding capacity of the 
different lots. The results follow in Table 82. 
Table 82 — Relative yields of seed corn selected at various dates 
during the fall and winter (1915-1917 ) 
Date of seed 
selection 
Duplica- . 
tions 
each year 
Yield per acre 
1915 
1916 
1917 
Average 
1916 and 
1917 
Three 
year 
average 
Bushels 
Bushels 
Bushels 
Bushels 
Bushels 
September . . . 
4 
66.6 
36.1 
38.3 
37.2 
47.0 
October 
4 
36.9 
38.3 
37.6 
November. . . 
4 
65.9 
37.3 
41.6 
39.4 
48^3 
December . . . 
4 
39.3 
42.4 
40.8 
February. . . . 
4 
44.3 
41.7 
43.0 
March 
4 
64Y 
42.1 
42.6 
42.3 
49^8 
Check 2 
4 
66.3 
40.3 
41.1 
40.7 
49.2 
lr The seed was harvested about the 15th of each month. 
2 The check seed was harvested from the same field while husking in 
November. 
As an average for the three years 1915-1917, seed corn har- 
vested by special selection from the field in September, Novem- 
ber, and March, and given good care after selection, yielded 
respectively 48.2. 49.(1, and 51.2 bushels per acre, while seed 
saved from the same field during the regular process of husking 
in November yielded 50.(1 bushels per acre. We may conclude 
from these data that corn harvested early and given special 
care in preservation will not outyield seed which has been ex- 
posed to the cold of winter without special care, provided both 
are selected for high germinative qualities. Seed which has 
received no special early selection and preservation may be 
expected to yield as well as specially cared for seed, provided 
equally satisfactory stands are obtained. No claim is made, 
however, that seed selected late in winter will necessarily 
germinate as dependably as will that gathered earlier. 
RELATIVE YIELDS OF DIFFERENT EAR TYPES 
During the four years 1914 to 1917, four ear types of 
Nebraska White Prize corn have been compared in yield with 
the original unselected corn from which the types were selected 
